Firefox

Mozilla Firefox, or simply Firefox, is a free and open-source web browser developed by the Mozilla Foundation and its subsidiary, Mozilla Corporation. Firefox is officially available for Windows 7 or ...
Language(s): C++, JavaScript, HTML, C, Rust
Operating system(s): Linux, mac OS: OS X 10.9 or later, Windows 7 or later, Android Jelly Bean or later, iOS 11 or later, FreeBSD, OpenBSD, NetBSD, illumos, Solaris
License: Mozilla Public License (MPL) 2.0

GCompris

GCompris is a high quality educational software suite, including a large number of activities for children aged 2 to 10. Some of the activities are game orientated, but nonetheless still educationa...
Language(s): legacy: C Python, current: C++, QML
Operating system(s): Android, iOS, Linux, macOS, Microsoft Windows
License: GNU General Public License

GNU Privacy Guard

GnuPG is a complete and free implementation of the OpenPGP standard as defined by RFC4880 (also known as PGP). GnuPG allows you to encrypt and sign your data and communications; it features a versatil...
Language(s): C
Operating system(s): Windows, Mac OS, RISC OS, Android, Linux
License: GPLv3

HTTrack

HTTrack is a free (GPL, libre/free software) and easy-to-use offline browser utility. It allows you to download a World Wide Web site from the Internet to a local directory, building recursively al...
Language(s): C
Operating system(s): Microsoft Windows, Mac OS X, GNU, GNU/Linux, FreeBSD and Android
License: GNU General Public License Version 3

LedgerSMB

The LedgerSMB project brings accounting software integrating invoicing, order processing, quotations and more (ERP) to small and midsize businesses. Features include: Sales (Invoices, Orders, Q...
Language(s): Perl, PL/pgSQL
Operating system(s): Unix, Linux, Mac OS, Windows, Android
License: GPLv2 General Public License Version 2